Bug 563757 - Support buffer listeners

Renamed IBufferListener.M_BUFFER_SAVED to BUFFER_SAVED
diff --git a/org.eclipse.handly.ui/src/org/eclipse/handly/ui/texteditor/TextEditorBuffer.java b/org.eclipse.handly.ui/src/org/eclipse/handly/ui/texteditor/TextEditorBuffer.java
index 294ab7e..79f8de6 100644
--- a/org.eclipse.handly.ui/src/org/eclipse/handly/ui/texteditor/TextEditorBuffer.java
+++ b/org.eclipse.handly.ui/src/org/eclipse/handly/ui/texteditor/TextEditorBuffer.java
@@ -12,6 +12,8 @@
  *******************************************************************************/
 package org.eclipse.handly.ui.texteditor;
 
+import static org.eclipse.handly.buffer.IBufferListener.BUFFER_SAVED;
+
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.ListenerList;
@@ -171,7 +173,7 @@
     @Override
     public int getSupportedListenerMethods()
     {
-        return IBufferListener.M_BUFFER_SAVED;
+        return BUFFER_SAVED;
     }
 
     @Override
diff --git a/org.eclipse.handly/src/org/eclipse/handly/buffer/Buffer.java b/org.eclipse.handly/src/org/eclipse/handly/buffer/Buffer.java
index 03a5498..1b0908e 100644
--- a/org.eclipse.handly/src/org/eclipse/handly/buffer/Buffer.java
+++ b/org.eclipse.handly/src/org/eclipse/handly/buffer/Buffer.java
@@ -12,6 +12,8 @@
  *******************************************************************************/
 package org.eclipse.handly.buffer;
 
+import static org.eclipse.handly.buffer.IBufferListener.BUFFER_SAVED;
+
 import org.eclipse.core.filebuffers.ITextFileBufferManager;
 import org.eclipse.core.filebuffers.LocationKind;
 import org.eclipse.core.runtime.CoreException;
@@ -136,7 +138,7 @@
     @Override
     public int getSupportedListenerMethods()
     {
-        return IBufferListener.M_BUFFER_SAVED;
+        return BUFFER_SAVED;
     }
 
     @Override
diff --git a/org.eclipse.handly/src/org/eclipse/handly/buffer/IBufferListener.java b/org.eclipse.handly/src/org/eclipse/handly/buffer/IBufferListener.java
index 8b5e4d9..ee5f499 100644
--- a/org.eclipse.handly/src/org/eclipse/handly/buffer/IBufferListener.java
+++ b/org.eclipse.handly/src/org/eclipse/handly/buffer/IBufferListener.java
@@ -21,11 +21,12 @@
 public interface IBufferListener
 {
     /**
-     * Bit-mask for the {@link #bufferSaved(IBuffer) bufferSaved} method.
+     * Bit-mask indicating that the {@link #bufferSaved(IBuffer) bufferSaved}
+     * method is supported by the buffer.
      *
      * @see IBuffer#getSupportedListenerMethods()
      */
-    int M_BUFFER_SAVED = 1 << 0;
+    int BUFFER_SAVED = 1 << 0;
 
     /**
      * Informs this listener that the contents of the given buffer
diff --git a/org.eclipse.handly/src/org/eclipse/handly/buffer/TextFileBuffer.java b/org.eclipse.handly/src/org/eclipse/handly/buffer/TextFileBuffer.java
index 86f2050..80c7bc9 100644
--- a/org.eclipse.handly/src/org/eclipse/handly/buffer/TextFileBuffer.java
+++ b/org.eclipse.handly/src/org/eclipse/handly/buffer/TextFileBuffer.java
@@ -12,6 +12,8 @@
  *******************************************************************************/
 package org.eclipse.handly.buffer;
 
+import static org.eclipse.handly.buffer.IBufferListener.BUFFER_SAVED;
+
 import org.eclipse.core.filebuffers.IFileBuffer;
 import org.eclipse.core.filebuffers.ITextFileBuffer;
 import org.eclipse.core.filebuffers.ITextFileBufferManager;
@@ -238,7 +240,7 @@
     @Override
     public int getSupportedListenerMethods()
     {
-        return IBufferListener.M_BUFFER_SAVED;
+        return BUFFER_SAVED;
     }
 
     @Override